Wired and wireless convergent extended-reach optical access network using direct-detection of all-optical OFDM super-channel signal

Abstract

We propose and demonstrate the feasibility of using all-optical orthogonal frequency division multiplexing (AO-OFDM) for the convergent optical wired and wireless access networks. AO-OFDM relies on all-optically generated orthogonal subcarriers; hence, high data rate (> 100 Gb/s) can be easily achieved without hitting the speed limit of electronic digital-to-analog and analog-to-digital converters (DAC/ADC). A proof-of-concept convergent access network using AO-OFDM super-channel (SC) is demonstrated supporting 40 - 100 Gb/s wired and gigabit/s 100 GHz millimeter-wave (MMW) ROF transmissions.

Low-cost MIMO-RoF-PON architecture for next-generation integrated wired and wireless access networks

“…Several integrated network architectures enabling wired and wireless services to operate together have been reported [20][21][22][23][24]. When in [20,21], the wired (wavelength division multiplexed (WDM)-PON) and wireless (MMW RoF) services are modulated on different wavelength signals it results in an expensive system if the deployment of a MIMO is also required.…”

“…Several integrated network architectures enabling wired and wireless services to operate together have been reported [20][21][22][23][24]. When in [20,21], the wired (wavelength division multiplexed (WDM)-PON) and wireless (MMW RoF) services are modulated on different wavelength signals it results in an expensive system if the deployment of a MIMO is also required. In [24] the wired OFDM and 60 GHz MMW wireless signals are integrated and modulated with the same wavelength signal which enables improved resource-sharing optimization in comparison with the schemes proposed in [20,21].…”

“…When in [20,21], the wired (wavelength division multiplexed (WDM)-PON) and wireless (MMW RoF) services are modulated on different wavelength signals it results in an expensive system if the deployment of a MIMO is also required. In [24] the wired OFDM and 60 GHz MMW wireless signals are integrated and modulated with the same wavelength signal which enables improved resource-sharing optimization in comparison with the schemes proposed in [20,21]. However, when the two MIMO approach is considered there is a need for another optical source and modulator.…”

Optical millimeter wave signal generation with frequency 16-tupling using cascaded MZMs and no optical filtering for radio over fiber system

“…Hence optical MM-Wave generation and RoF transmission methods have been proposed. Though there are several methods of optical MM-Wave generation techniques, external modulation based optical frequency multiplication techniques have gained much attention due to its higher modulation bandwidth, stability and flexibility [4][5][6][7]. Several optical frequency upconversion/multiplication techniques have been demonstrated with different frequency multiplication such as four, six, eight, ten and twelve [8][9][10][11][12][13][14][15][16].…”

Hybrid OFDM and Radio-Over-Fiber Transport System Based on a Polarization Modulator

“…Given its great potential to deliver gigabit data streams, employing MMW signal transmissions to achieve next generation wireless networks is widely developed in the field of communication and radio-over-fiber (RoF) transport systems are particularly utilized to distribute MMW signals between a central office (CO) and base stations (BS) [1]- [3]. Furthermore, to realize low cost and high transmission performance in RoF-based optical wireless access networks, employing optical frequency up-conversion techniques to increase the central frequency of a radio-frequency (RF) signal to MMW range has also attracted much attention in optical research [4]- [7]. For example, in [7], a photonic MMW-ultra-wideband signal generation technique is realized via directly frequency up-conversion using a dual-parallel MZM.…”